81:22
وَمَا صَاحِبُكُم بِمَجْنُونٍۢ ٢٢
Saheeh International
And your companion is not [at all] mad.
Tafsir of "Ibn Kathir" (English)
And your companion is not a madman. Ash-Sha`bi,Maymun bin Mihran, Abu Salih and others who have been previously mentioned, all said,"This refers to Muhammad ."Allah said,وَلَقَدْ رَاهُبِالاْاُفُقِ الْمُبِينِ